Blowpipe.



PATENTED DEG. 24, 1907.'

- C. DELCAMPE.'

BLOWPIPE.

APPLICATION FILED MARJB, 1907.

Za/M292 CYRILLE DELCAMPE, OF QUINGY, MASSACHUSETTS.

B LOWPIPE.

Specification of Letters Patent.

Application filed March 13, 1907- Serial N0. 362,230.

Patented Dec. 24, 1907.

T call whom it may concern:

Be it known that I, CYEILLEDELCAMPE, a subject of the King of Belgium, residing at Quincy, in the county of Norfolk and State 5 of Massachusetts, have invented certain new and useful Improvements, in Blowpipes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in blow-pipes adapted to mix and burn a combustible gas and a gas which supports combustion. It has found its practical embodii ment in a blow-pipe particularly designed to use acetylene and oxygen.

The construction and operation of my improved blow-pipe will be understood from the accompanying drawings, taken in connection with the following description.

In the drawing, Figure 1 is an elevation,

partly in section, of the complete blow-pipe g Fig. 2 is a central section of the head of the 25 blow-pipe on an enlarged scale, and Fig. 3 is a section on the line 3 3- of Fig. 1.

The blow-pipe comprisesan acetylene pipe A and an oxygen pipe B, the exit end of the oxygen pipe being arranged within the exit end of the acetylene pipe which forms the blow-pipe head. Secured to'the upper end of the pipe A is an elbow c terminating inthe cylindrical enlargement b. The elbow is provided at the turn with an opening, through which the upper end of the oxygen pipe B passes. Secured to the end of the pipe B within the cylindrical enlargement of the elbow a is afianged collar c screw-threaded on its inside and outside, as shown. The screwthreads on the inside are intended to take a screw-threaded oxygen injector nozzle d and the screw-threads on the outsidev are intended to take the cylindrical chimney e provided with the holes e. These holes or passages e are arranged in a circle and are located in the chimney e forward of the exit end of the injector nozzle d and their directionis at rightangles to the direction of flow of the gas from the injector nozzle. By this arrangement the jets of gas from the holes e converge directly in the path of the gas from the injector nozzle d and an intimate mixture of the gases is secured. The holes or passages e are, moreover, contracted as they approach the inside of the chimney, as shown more clearly in Fig. 2, for the purpose of giving the desired velocity to the acetylene jets passing through them and preventing the flashing back of the flame into the chamber outside of the chimney. Screwed into the cylindrical enlargement b of the elbowa is the plug f, containing a cylindrical gas chamber of somewhat greater diameter than the chimney e. The diameter of this cylindrical chamber is reduced near the forward end of the plug to form a shoulder against which the end of the chimneye rests and the chamber is continued beyond the shoulder as the relatively contracted chamber f forming themixing cham,- ber and into the forward end of which the main nozzle g is screwed.

The acetylene pipe A is connectedJ by a suitable detachable coupling A to the' pipe A2 running through a cylindrical sheathingA D. The coupling A is provided onits inside with a plurality of layers of gauze, as shown, to prevent back firing, and the pipe A2 ter.- minates outside of the sheathing Dl in aplug h having a turn-cock h. The pipe B is connected by the detachable coupling B to the pipe B2, which also passes through the sheathing D and terminates at its lower endl in the plug lm, having a turn-cock m- To detach the pipes A and B from the handle-D in order to inspect and repair the wire gauzes, etc., the detachable couplings B and A are unscrewed, as will be understood. The pipe B is bent away from the pipe A, but secured in proximity thereto by the clip E., the pipe being sufficiently resilient to press the front end of the chimney e into contact with the shoulder within the plug f. The cylindrical sheathing D serves as a handle for the blow- Vhen it is desired to use the blow-pipeA so constructed, an injector nozzle d and amain nozzle g are selected (from setsof nozzles kept for that purpose) of a xedrelative capacity, such as to give the proper mixturev of oxygen and acetylene at a definite pressure. The oxygen su ply is maintained under a greater pressure t an the acetylene supply and when the cocks m and h are opened, the oxygen rushing through the injector nozzled meets the entering jets of acetylene in the manner above describedv and the mixed gases flow at a high velocity through the main` nozzle g. If it is desired to change the size of the flame, both the main nozzle and the injector nozzle are removed, and other nozzles of different capacity, but bearing the same definite rela.- tion to one another, are substituted. It results from this that when the iiame is to be started it is only necessary to open fully the cocks m and h and light the mixed gases issuing from theA nozzle g, and a llame of the desired size and of great impinging force is at once secured, and it is moreover unnecessary to Search for the proper mixture of acetylene and oxygen by adjusting regulating` valves, since at a definite pressure the proper mixture of acetylene and oxygen results from the relation between the main and injector nozzles and the acetylene orifices e/ in the chimney e.

In practice, each blow-pipe is provided with a set of main nozzles and a set of injector nozzles of corresponding relative capacity properly calibrated for a definite pressure and marked with suitable reference characters.

What I claim is l, In a blow-pipe to which a combustible gas and a gaseous supporter of combustion are supplied under pressure, a gas supply pipe terminating in a head containing a mixing chamber, a detachable main nozzle in said head forming an outlet from the mixing chamber and a second gas supply pipe terminating in said head and provided with a detachable injector nozzle of a definite capacity with relation to the main nozzle and which discharges directly into the mixing chamber, whereby when it is desired to change the size of the flame both detachable nozzles may be removed and replaced by other nozzles of different capacity, but having the same definite relation, substantially as described.

2. In a blow-pipe, a gas supply pipe terminating in a head containing a gas chamber and a mixing chamber, a detachable main nozzle in said head forming an outlet from the mixing chamber, a partition in said head between the gas chamber and mixing chamber, gas ports in said partition, and a second gas supply pipe terminating in said head and provided with a detachable injector nozzle having a definite capacity with relation to the main nozzle and which discharges into the mixing chamber, whereby when it is desired to change the size ofthe flame both detachable nozzles may be removed and replaced by other nozzles of different capacity but havlng the same definite relation, substantially as described.

3: In a blow-pipe, a gas supply pipe terminating in a head containing a gas chamber and a mixing chamber, a detachable main nozzle in said head forming an outlet from the mixing chamber, a second gas pipe extending into said head and terminating in a nozzle support, a detachable injector nozzle in said support of a definite capacity with relat1on to the main nozzle, a chimney surrounding said injector nozzle and forming a partition between the gas chamber and the mixing chamber, and gas ports in said chimney, whereby when it is desired to changehthe ezanga size ofthe flame both detachable nozzles ma;vr be removed and replaced by other nozzles ol' different capacity but having the same dellnite relation, substantially as described.

4. In a blow-pipe, a gas supply pipe terminating in a head containing a gas chamberI and a mixing chamber, a nozzle in said head forming an outlet from the mixing chamber, a partition in said head between the gas chamber and the mixing chamber, ports in said partition, and a second gas supply pipe terminating in said head and provided witli an injectornozzle which discharges into the mixing chamber, the parrition and the injector nozzle lbeing so eoustructed and arranged that the direction ol' flow from the gas Yports in the partition is ai right angles to the direction of llow 'lrom the injector nozzle, whereby an intimate mixture of the gases is secured, substantially as described.

5. In a blow-pipe, a gas supply pipe terminating in a head containing a gas chamber and a mixing chamber, a nozzle in said head forming an outlet from the mixing chamber, a partition in said head between the gas chamber and mixing chamber, gas ports in said partition having a progressively reduced diameter from the gas chamber toward the mixing chamber, and a second gas suppljY pipe terminating in said head and provided with an injector nozzle which discharges into the mixing chamber, whereby the llashing back of the flame into the gas chamber is prevented, substantially as described.

6. In a blow-pipe, a gas supply pipe terminating in a head containing a gas chamber and a mixing chamber, a nozzle in said head forming an outlet from the mixing chamber, a second gas supply pipe extending into said head and terminating in a nozzle support, a nozzle in said support, a chimney surrounding said nozzle and forming a partition between tlie gas chamber and the mixing chamber, and a circular series o'l gas ports in said chimney forward of the said nozzle and having a progressively reduced diameter from the gas chamber toward the mixing chamber, substantially as described.

7. In a blow-pipe, a gas pipe terminating in a head containing a gas chamber, a sho ulder, a mixing chamber beyond the shoulder, and a nozzle forming an outlet from the mixing` chamber, a second gas pipe entering said head and carryingon its free end a chimney adapted to rest with its open end against the shoulder in the head and form a p artition between the gas and mixing cha'n'ibers-` and gas ports in said chimney, substantially as described- 8. In a blow-pipe, a gas pipe terminating in a head containing a gas chamber, a shoulder, a mixing chamber beyond the shoulder, and a nozzle forming an outlet from the mixing chamber, a second resilient gas pipe entering said head and carrying on its free end a nozzle and a chimney surrounding said nozzle, the open end of said chimney being forced by the resiliency of the pipe against the shoulder in the head to form a partition between the gas chamber and the mixing chamber, and gas ports in said chimney, substantially as described.

9. In a blow-pipe, a gas pipe terminating in a head containing a gas chamber, a shoulder, a mixing chamber beyond the shoulder, and a nozzle forming an outlet from the mixing chamber, a second resilient gas pipe supported in proximity to the irst pipe but bent outwardly therefrom, a clip on the iirst pipe engaging the second pipe, the free end of the second pi e entering the head and carrying a nozzle and a chimney surrounding the nozzle, the open end of the said chimney being forced by the resiliency of the pipe against the shoulder in the head to form a partition between the gas chamber and the mixing chamber, and gas ports in said chimney, substantially as described. y

10. In a blow-pipe, a head containing a gas chamber and a mixing chamber, a nozzle a second gas supply pipe extending into said head and terminating 1n a nozzle support, an injector nozzle in said support, a chimney surrounding said nozzle and forming a partition between the gas chamber and the mixing chamber, and gas ports in said chimney, substantially as described.

In testimony whereof I alix my signature, in presence of two witnesses.

CYRILLE DELCAMPE.

Witnesses:

F. L. BRAKE, ANDR BETHYR. 

